Door threshold



FIG. 1 is a front perspective view of a door threshold.

FIG. 2 is a front elevational view of a door threshold.

FIG. 3 is a rear elevational view of a door threshold.

FIG. 4 is a right side elevational view of a door threshold.

FIG. 5 is a left side elevational view of a door threshold.

FIG. 6 is a top plan view of a door threshold.

FIG. 7 is a bottom plan view of a door threshold; and,

FIG. 8 is a front perspective view of a door threshold.

The broken lines shown in FIG. 6 illustrate portions of the doorthreshold that form no part of the claimed design.

CLAIM The ornamental design for a door threshold, as shown anddescribed.